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Rottneros Mill is increasing
its CTMP capacity

Rottneros Mill in Sunne, Värmland

Rottneros Mill is focusing on the development and production of CTMP. The pulp is used in the production of cartonboard, packaging, tissue paper, filters and fiber cement. We are expanding to increase capacity and by 2026, production will increase from the present 120 thousand tonnes to 170 thousand tonnes per year.

The mill has produced mechanical pulp since 1887.

Spring by Rottneros is our brand name för CTMP.

95% of the wood is fully utilised in production.

This year’s figures for Rottneros Mill

Production of CTMP in 2023 amounted to 122,100 tons, which is a new annual record and an increase of about 1 percent compared to the previous year.


Emissions of fossil CO2 decreased by 20% during 2023 compared to the previous year. More than two thirds of the energy is fossil-free. 95% of the wood can be recovered in CTMP production.


There are extensive investments of 180 MSEK in an expansion of the CTMP line. The increase in capacity and production is estimated at 165,000 tonnes of pulp per year, from autumn 2024.


CTMP Mechanical pulp

Rottneros CTMP offers high purity, strength and rigidity with low weight – valuable properties for cartonboard manufacturers. CTMP can be customised for a number of different special applications where freeness, porosity or bleaching level is crucial.


How the mill’s CTMP is used


Mechanical pulp makes it possible to produce a thicker, and therefore more rigid cartonboard from the same amount of raw material.


Special applications

Mechanical pulp can be customised for a number of different special applications where freeness, porosity or bleaching level is crucial.

Special applications

Pulp for fibre trays

The raw material for our own water molded fiber trays consists of 100% mechanical pulp from pure forests.

Fiber trays

A tribute to the groundwood line - an important part of our mill’s history

Watch the film about Rottneros Mill’s groundwood line which started up in 1887 and was closed down in December 2022, after 135 years of production, the last of its kind in Sweden in recent years.

The main reasons for the closure were long-term negative prospects for printing paper and deterioration in the electricity market.

Participating in the film are former employees who share memories of how the timber was floated and transported via ropeway.


Come and work for us

Welcome to Rottneros Mill.
With us, you have great opportunities to make a difference, enhance your knowledge and develop to your full potential.

Job opportunities

Working at Rottneros

Rottneros AB / Rottneros Mill


Rottneros Mill
686 94 Sunne